Tone harmonizer



May 1, 1928.

- J. B. CRAIG TONE HARMONIZER Filed July ll, 1925 Patented May 1, 1928.

V UNITED STATES JOHN B. CRAIG, 0F CASTLE ROCK, COLORADO.

TONE HARMONIZER.

Application filed July 11, 1925. Serial No. 42,930.

This invention relates to improvements in tone harmonizers, and is moreparticularly adapted to a device which may be readily and easilyattached to the throat portion of the tone arm of a graphophone for thepurpose of softening the tones before the same are emitted from theamplifier or horn of the graphophone, and at the same time producing aclear and harmonious tone.

Another important object of the invention is to provide a device of theabove mentioned character which is simple in construction, inexpensive,strong and durable and further well adapted to the purpose for which itis designed.

Other objectsand advantages of this invention will become apparentduring the course of the following description taken in connection withthe accompanying drawing.

In the accompanying drawing forming a part of this application and inwhich like numerals designate like parts throughout the same:

Figure 1 is a side elevation of the tone harmonizer embodying myinvention, showing the manner in which the same is attached to thethroat of the tone arm of a graphophone, and being disposed within thecabinet.

Figure 2 is an enlarged longitudinal sectional view through the toneharmonizer.

Figure 3 is a sectional view taken approximatelyon line 3-3 of Figure 2,and

Figure at is a top plan view of the device.

In the drawing wherein for the purpose of illustration is shown thepreferred embodiment of my invention, the numeral 1 designates generallya cabinet of any conventional type of graphophone, and extendingdownwardly into the cabinet is a throat portion 2 of the tone arm 3.Adapted to be attached to the throatof the tone arm at the open endthereof, the smaller rear end of my improved tone harmonizer designatedgenerally by the numeral 4t.

My tone harmonizer com rises a substantially rectangular cross sectionalcasing which includes the top and bottom 5 and 6 respectively, the sidewalls 7 and 8, and a front wall 9. As is clearly illus rated in thedrawing, the side walls have their upper edges gradually tapering towardthe rear end of the casing from a point adjacent the front end thereofand furthermore the side walls gradually converge toward their smallerrear ends. The top and bottom walls 5 and 6 respectively will alsogradually taper toward their rear ends for cooperation with the taperingor converging side walls so that the rear end of the casing issubstantially smaller than the forward end. Fur thermore, the top wall 5terminates at a point adjacent the front wall 9 so as to provide a soundemitting passage 10.

An elongated strip of brass or other similar material extendslongitudinally within the casing 4 and is secured on the bottom 6. lhisstrip is indicated at 11 in the drawing. Extending upwardly from thestrip 11 at spaced intervals are the lugs 12, the same being slottedvertically for receiving and supporting th brass strip 13, the saneextending substantially transversely within the casing of the toneharmonizer, and these strios are in the path of the sound entering thesmaller end of the casing from the throat of the tone arm. The purposeof these strips is to reduce vibration as well as the sharp tonesemitted from the tone arm and the throat which is associated therewithand extends downwardly into the cabinet 1.

The top wall 5 of the casing has formed therein a series of slots 14,the same being arranged in staggered relation with respect to each otherand the provision of the slots provides a means for accommodating theresonators 15, the same extending vertically through the various slotsand downwardly into the casing 4-, the upper ends of these resonatorsbeing provided with suitable openings such as are shown at 16, andthrough which extends the wire 17, the latter being secured at itsrespective ends on the outer face of the top wall of the casing so thatthe resonators will be suspended from the wire through the slots anddisposed within the casing in their proper positions. As is clearlyillustrated in Figure 2, the resonators increase gradually in lengthfrom the rear to the forwardmost one. The ressonators and the brassstrips 13 cooperate to obtain full and harmonious tones which areemitted through the passage 10 at the top of the forward end of thecasing 4, and from where it enters the cabinet 1 and leads the samethrough the forward open face thereof. For further obtaining thefullness in the tone, a bell 18 is arranged in the forward end of thecasing, the same being secured to the front wall 9 in any suitablemanner.

- The tone harinonizer embodying the present invention is preferablyconstructed of wood and the wooden casing will take care of reed andother string instruments except a piano which is cared for by the woodand metal, the brass strips and the resonators taking care of the bandinstruments, vocal music, whereby the tone will be properly blended, andthe fullness and harmonic effect will be obtained.

A device of the above mentioned character may be readily and easilyattached to the throat of the tone arm of a graphophone and will notnecessitate any material alterations with respect to the cabinet inwhich the tone harmonizer is adapted to be disposed when associated witha graphophone. V

While I have shown the preferred embodiment-of my invention, it is to beunderstood that minor changes in the size, shape and arrangement ofparts may be resorted to with out departing from the spirit of theinvention and the scope ofthe appended claims.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent is il. "The combination with a phonographincluding a cabinet provided with a tone arm, the throat of whichextends into the cabinet; of a tone harmonizer comprising a casinghaving a top and a bottom, said casing being arranged within the cabinetand communieating at its rear end with the throat of the including-acabinet provided with "a tone 1 ends to the top of the casing,

arm, the throat of which extends into the cabinet, of atone harmonizercomprising a casing having a top and a bottom, said casing beingarranged within the cabinet and adapted to communicate at its rear endwith the throat of the tone arm, the forward end of the casing beingprovided with a sound emitting passage, the top of the casing beingprovided with a series of transversely extending slots, a plurality ofresonators-extending downwardly through the slots into the casing, theupper ends of the resonators being provided with registering openings,and a securing wire extending therethrough and adapted to be attached atits respective 3. The combination with a phonograph including a cabinetprovided with a tone arm, the throat of which extends into the cabinet,of a tone harmonizer comprising a casing havinga top and a bottom, saidcasin'g being ar anged within the cabinet and adapted to'communicate atits rear end with the throat of the tone arm, the forward end ofthecasing being provided with a sound emitting passage, the top of thecasing being provided with av series of transversely extending slots,said slots being disposed in staggered relation with respect to eachother, a plurality of resonators extending downwardly through the slotsinto the casing, the upper ends of the resonators being provided withregistering openings, a securing wire extending through the registeringopenings in the upper ends of the resonators and adapted to be attachedat its respective ends to the top of the casing, said resonatorsincreasing gradually in length from the rear one to the forwardmost one.

In testimony whereof I affiX my signature.

JOHN B. CRAIG.

